The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 9, 2026

Lycoming O-320 series

27,315 aircraft on the U.S. register carry a Lycoming O-320 series engine, rated at about 180 horsepower. The Cessna 172 Skyhawk is the model most often fitted with it (9,462 aircraft). The aircraft carrying it were built between 1949 and 2026.

The FAA records engines by code, usually at the level of a series ("O-320 series") rather than the exact variant; this page gathers every FAA code that reads as Lycoming O-320 series (2 codes). FAA spellings: 0-320 SERIES · O-320 SERIES.

When the aircraft were built by decade

By decade built, as a table
aircraft
19305
1940234
19502,383
19605,444
197011,405
19801,935
19901,132
2000831
201099
202055

What the FAA has certified, ordered and been told about the Lycoming O-320 series the component layer

The design is held under 1 type certificate (E-274, held by Lycoming Engines). The FAA has issued 29 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 349 failure reports with the FAA since 1995, 19 of them in the last ten years.

FAA orders 29 airworthiness directives · newest first

2026-04-082026-04-11 · Engine (Reciprocating) · engine
2024-12-052024-21-02 · Engine (Reciprocating) · engine
2022-08-152022-16-03 · Engine (RECIPROCATING) · engine
2012-03-272012-03-07 · Carburetor · engine
2008-10-202008-19-05 · Parallel Valve'' reciprocating engines · engine
2006-01-312005-26-10 · ECi cylinder assemblies. · engine

All orders naming the Lycoming O-320 series

Failure reports 349 since · what operators and shops told the FAA

010203141950106111621426
Failure reports by year, as a table
reports
952
961
972
986
007
0139
0224
0339
0430
0541
0623
0732
0818
0915
1013
117
1210
134
146
152
169
171
186
191
203
211
232
251
264

Parts most often reported as the reports name them

Spar18Tube17Cylinder15Bulkhead9Alternator8Control Cable8Bolt7Carburetor7Fitting6Float6
Parts most reported, as a table
reports
Spar18
Tube17
Cylinder15
Bulkhead9
Alternator8
Control Cable8
Bolt7
Carburetor7
Fitting6
Float6

Latest reports

2026-09-03Gascolator: dirty
2026-05-19Impulse Coupling: unserviceable
2026-03-10Cylinder Head: cracked
2026-03-05Cylinder: cracked
2025-11-24Cylinder: cracked

Certificates and bulletins

E-274Type certificate held by Lycoming Engines · 60 models listed · revised April 30, 2013

Safety bulletins 17 · advice, not orders

2022-09-26NE-06-31R6 · Engine Lubricating Oils
2019-05-02NE-19-08 · Reciprocating Engine Cylinder Section - Lycoming Engines Parallel Valve Cylinders
2016-05-13NE-08-32R1 · Propeller Governor Idler Gear Shaft Set Screw
2014-03-24NE-14-13 · Reciprocating Engine - Cylinder Mounting Studs
2012-11-21NE-13-06 · Pushrod Shroud Spring Retainers, Engine Components Part No. AEL14995, for Lycoming Engines 320,...

Sources: the FAA's type certificate data sheets, airworthiness directives, supplemental type certificates, special conditions and special airworthiness information bulletins (Dynamic Regulatory System), and the FAA's service difficulty reports. A failure report is what an operator or repair station chose to file; the counts show reporting as much as reliability, and larger and commercial fleets report more. How the systems are grouped.

Connections how this engine series links to the rest of the register

Fitted to
Where they are
Biggest operators
Airworthiness

The whole map of how records connect · these connections as data: /graph/engine/lycoming-o-320-series.json.

Aircraft newest certificates first · 27,315

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N101D Aerocar
ONE
Fixed-wing, single engine Da Plane LLC
Longmont, Colorado
Standard 2020-06-02 ValidFAA registration status code V: Valid registration. All codes
N5667S Beech
A23-19
Fixed-wing, single engine Individual owner
Kansas
Standard 2020-06-02 ValidFAA registration status code V: Valid registration. All codes
N6463G Cessna
172N
Fixed-wing, single engine Teens-In-Flight INC
Palm Coast, Florida
Standard 2020-06-02 ValidFAA registration status code V: Valid registration. All codes
N7329G Cessna
172K
Fixed-wing, single engine Five Guys Aviation LLC
Pendleton, South Carolina
Standard 2020-06-02 ValidFAA registration status code V: Valid registration. All codes
N4264Z Piper
PA-18-150
Fixed-wing, single engine Allen Steven L
Thatcher, Arizona
Standard 2020-06-01 ValidFAA registration status code V: Valid registration. All codes
N5411H Cessna
172M
Fixed-wing, single engine Earth Grazer INC
Homer Glen, Illinois
Standard 2020-06-01 ValidFAA registration status code V: Valid registration. All codes
N6365R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2020-06-01 ValidFAA registration status code V: Valid registration. All codes
N7227F Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Maine
Standard 2020-06-01 ValidFAA registration status code V: Valid registration. All codes
N733YP Cessna
172N
Fixed-wing, single engine Co-owned owner
Michigan
Standard 2020-06-01 ValidFAA registration status code V: Valid registration. All codes
N8856C Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Restricted 2020-06-01 ValidFAA registration status code V: Valid registration. All codes
N9098K Piper
PA-28-161
Fixed-wing, single engine D G Aircraft LLC
Lewes, Delaware
Standard 2020-06-01 ValidFAA registration status code V: Valid registration. All codes
N734AH Cessna
172N
Fixed-wing, single engine Individual owner
Montana
Standard 2020-05-29 ValidFAA registration status code V: Valid registration. All codes
N5004W Piper
PA-28-160
Fixed-wing, single engine N5004W LLC
Kansas City, Missouri
Standard 2020-05-28 ValidFAA registration status code V: Valid registration. All codes
N5220B Mooney Aircraft Corp.
M20
Fixed-wing, single engine Individual owner
Texas
Standard 2020-05-28 ValidFAA registration status code V: Valid registration. All codes
N5854W Piper
PA-28-160
Fixed-wing, single engine Atluas LLC
Dallas, Texas
Standard 2020-05-28 ValidFAA registration status code V: Valid registration. All codes
N63WA Albert W B
VANS RV6A
Fixed-wing, single engine Individual owner
Georgia
Experimental 2020-05-28 ValidFAA registration status code V: Valid registration. All codes
N821BE Piper
PA-28-161
Fixed-wing, single engine Ras Aviation LLC
Elyria, Ohio
Standard 2020-05-28 ValidFAA registration status code V: Valid registration. All codes
N9578U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Scheutzow David P
Medina, Ohio
Standard 2020-05-28 ValidFAA registration status code V: Valid registration. All codes
N98PF Piper
PA-28-161
Fixed-wing, single engine Dakota Acre Farms INC
Denhoff, North Dakota
Standard 2020-05-28 ValidFAA registration status code V: Valid registration. All codes
N1759A Piper
PA-18A
Fixed-wing, single engine Individual owner
Texas
Restricted 2020-05-27 ValidFAA registration status code V: Valid registration. All codes
N20575 Cessna
172M
Fixed-wing, single engine Individual owner
California
Standard 2020-05-27 ValidFAA registration status code V: Valid registration. All codes
N3072P Piper
PA-23-150
Fixed-wing, multi-engine Individual owner
Illinois
Standard 2020-05-27 ValidFAA registration status code V: Valid registration. All codes
N4301X Piper
PA-28-140
Fixed-wing, single engine Destination 55 LLC
Cave Springs, Arkansas
Standard 2020-05-27 ValidFAA registration status code V: Valid registration. All codes
N51515 Cessna
172P
Fixed-wing, single engine Co-owned owner
California
Standard 2020-05-27 ValidFAA registration status code V: Valid registration. All codes
N6528W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Ohio
Standard 2020-05-27 ValidFAA registration status code V: Valid registration. All codes
N733RY Cessna
172N
Fixed-wing, single engine Geaux Giddum 1 LLC
Brandon, Mississippi
Standard 2020-05-27 ValidFAA registration status code V: Valid registration. All codes
N800FC Cessna
172I
Fixed-wing, single engine Individual owner
California
Standard 2020-05-27 ValidFAA registration status code V: Valid registration. All codes
N2626P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Georgia
Standard 2020-05-26 ValidFAA registration status code V: Valid registration. All codes
N3802Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2020-05-26 ValidFAA registration status code V: Valid registration. All codes
N46B Novotny Gary J
RV-4
Fixed-wing, single engine Individual owner
California
Experimental 2020-05-26 ValidFAA registration status code V: Valid registration. All codes
N91117 Piper
PA-18-150
Fixed-wing, single engine White Wings LLC
Anchorage, Alaska
Standard 2020-05-26 ValidFAA registration status code V: Valid registration. All codes
N2720P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Georgia
Standard 2020-05-22 ValidFAA registration status code V: Valid registration. All codes
N7951F Piper
PA-28-151
Fixed-wing, single engine 1World Aero LLC
Fort Meade, Maryland
Standard 2020-05-22 ValidFAA registration status code V: Valid registration. All codes
N1141U Cessna
172M
Fixed-wing, single engine Flight School INC
Spring, Texas
Standard 2020-05-21 ValidFAA registration status code V: Valid registration. All codes
N5288W Piper
PA-28-160
Fixed-wing, single engine Individual owner
California
Standard 2020-05-21 ValidFAA registration status code V: Valid registration. All codes
N677LB Piper
PA-28-151
Fixed-wing, single engine Mae Development LLC
Wilmington, Delaware
Standard 2020-05-21 ValidFAA registration status code V: Valid registration. All codes
N733SX Cessna
172N
Fixed-wing, single engine Co-owned owner
Iowa
Standard 2020-05-21 ValidFAA registration status code V: Valid registration. All codes
N2355H Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2020-05-20 ValidFAA registration status code V: Valid registration. All codes
N25MP Wilmot Philip S
VANS RV-4
Fixed-wing, single engine Co-owned owner
Colorado
Experimental 2020-05-20 ValidFAA registration status code V: Valid registration. All codes
N2951G Champion
7GCBC
Fixed-wing, single engine Fletcher Flying Service 419 LLC
Labelle, Florida
Standard 2020-05-20 ValidFAA registration status code V: Valid registration. All codes
N61689 Cessna
172M
Fixed-wing, single engine Bc 414 LLC
Los Angeles, California
Standard 2020-05-20 ValidFAA registration status code V: Valid registration. All codes
N1625P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Idaho
Standard 2020-05-19 ValidFAA registration status code V: Valid registration. All codes
N4353T Thomas Robert E
RV-6
Fixed-wing, single engine Individual owner
California
Experimental 2020-05-19 ValidFAA registration status code V: Valid registration. All codes
N46539 Cessna
172K
Fixed-wing, single engine Jsc Consulting Group LLC
Norwich, New York
Standard 2020-05-19 ValidFAA registration status code V: Valid registration. All codes
N64HS Steiner Harold A
RV-4
Fixed-wing, single engine Co-owned owner
Colorado
Experimental 2020-05-19 ValidFAA registration status code V: Valid registration. All codes
N739ZW Cessna
172N
Fixed-wing, single engine Holladay Aviation LLC
Jacksonville, Florida
Standard 2020-05-19 ValidFAA registration status code V: Valid registration. All codes
N7478G Cessna
172K
Fixed-wing, single engine Individual owner
Minnesota
Standard 2020-05-19 ValidFAA registration status code V: Valid registration. All codes
N81425 Aeronca
7GCBC
Fixed-wing, single engine Pegasus Copters LLC
Makawao, Hawaii
Multiple 2020-05-19 ValidFAA registration status code V: Valid registration. All codes
N8169N Piper
PA-28-140
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2020-05-19 ValidFAA registration status code V: Valid registration. All codes
N8407M Cessna
A150K
Fixed-wing, single engine Individual owner
Colorado
Standard 2020-05-19 ValidFAA registration status code V: Valid registration. All codes
N9115D Piper
PA-18
Fixed-wing, single engine Individual owner
Montana
Standard 2020-05-19 ValidFAA registration status code V: Valid registration. All codes
N1902H Piper
PA-28-161
Fixed-wing, single engine Abraxis Air LLC
Casa Grande, Arizona
Standard 2020-05-18 ValidFAA registration status code V: Valid registration. All codes
N2526M Piper
PA-12
Fixed-wing, single engine Individual owner
Alaska
Standard 2020-05-18 ValidFAA registration status code V: Valid registration. All codes
N52200 Cessna
172P
Fixed-wing, single engine Individual owner
Florida
Standard 2020-05-18 ValidFAA registration status code V: Valid registration. All codes
N5437R Cessna
172M
Fixed-wing, single engine Individual owner
Michigan
Standard 2020-05-18 ValidFAA registration status code V: Valid registration. All codes
N6090D Piper
PA-18A 150
Fixed-wing, single engine Co-owned owner
North Carolina
Standard 2020-05-18 ValidFAA registration status code V: Valid registration. All codes
N65528 Cessna
172P
Fixed-wing, single engine Individual owner
Louisiana
Restricted 2020-05-18 ValidFAA registration status code V: Valid registration. All codes
N992RM Piper
PA-22-150
Fixed-wing, single engine Palm Aerobatic Aircraft LLC
Port Saint Lucie, Florida
Standard 2020-05-18 ValidFAA registration status code V: Valid registration. All codes
N3547M Piper
PA-28-161
Fixed-wing, single engine Individual owner
South Carolina
Standard 2020-05-15 ValidFAA registration status code V: Valid registration. All codes
N3995Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Restricted 2020-05-15 ValidFAA registration status code V: Valid registration. All codes
N4816A Piper
PA-22-150
Fixed-wing, single engine Individual owner
Kentucky
Standard 2020-05-15 ValidFAA registration status code V: Valid registration. All codes
N5686U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2020-05-15 ValidFAA registration status code V: Valid registration. All codes
N123WP Mccormick
BUSHBY MUSTANG II
Fixed-wing, single engine Individual owner
Texas
Experimental 2020-05-14 ValidFAA registration status code V: Valid registration. All codes
N13619 Cessna
172M
Fixed-wing, single engine Co-owned owner
California
Standard 2020-05-14 ValidFAA registration status code V: Valid registration. All codes
N2140Y Piper
PA-28-161
Fixed-wing, single engine Norcal Flight Club
Vacaville, California
Standard 2020-05-14 ValidFAA registration status code V: Valid registration. All codes
N285DM American Champion Aircraft
7GCBC
Fixed-wing, single engine 4 Play Aviation LLC
Port Orange, Florida
Standard 2020-05-14 ValidFAA registration status code V: Valid registration. All codes
N4268J Piper
PA-28-140
Fixed-wing, single engine Luxair LLC
Van Nuys, California
Standard 2020-05-14 ValidFAA registration status code V: Valid registration. All codes
N50AH Heironimus Roger L
SWICK-T
Fixed-wing, single engine Individual owner
Iowa
Experimental 2020-05-14 ValidFAA registration status code V: Valid registration. All codes
N8284N Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2020-05-14 ValidFAA registration status code V: Valid registration. All codes
N95264 Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2020-05-14 ValidFAA registration status code V: Valid registration. All codes
N9939Y Champion
7GCB
Fixed-wing, single engine Individual owner
South Dakota
Standard 2020-05-14 ValidFAA registration status code V: Valid registration. All codes
N5115U Miears H R
SUPER SPORT
Fixed-wing, single engine Individual owner
Nevada
Experimental 2020-05-13 ValidFAA registration status code V: Valid registration. All codes
N8339D Piper
PA-28-161
Fixed-wing, single engine Ld Flight LLC
Houston, Texas
Standard 2020-05-13 ValidFAA registration status code V: Valid registration. All codes
N95461 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arkansas
Standard 2020-05-13 ValidFAA registration status code V: Valid registration. All codes
N12HR D Andrea Raymond J
RV 4
Fixed-wing, single engine Individual owner
Georgia
Experimental 2020-05-12 ValidFAA registration status code V: Valid registration. All codes
N46345 Cessna
172K
Fixed-wing, single engine Hellgamite INC
Dover, Delaware
Standard 2020-05-12 ValidFAA registration status code V: Valid registration. All codes
N80327 Cessna
172M
Fixed-wing, single engine Highland Rim Aviation LLC
Springfield, Tennessee
Standard 2020-05-12 ValidFAA registration status code V: Valid registration. All codes
N251JB Champion
7GCAA
Fixed-wing, single engine Individual owner
Illinois
Standard 2020-05-11 ValidFAA registration status code V: Valid registration. All codes
N38972 Piper
PA-28-161
Fixed-wing, single engine August Aero LLC
Kalispell, Montana
Standard 2020-05-08 ValidFAA registration status code V: Valid registration. All codes
N57662 Bellanca
7GCBC
Fixed-wing, single engine August Aero LLC
Kalispell, Montana
Standard 2020-05-08 ValidFAA registration status code V: Valid registration. All codes
N7XD Drzymala Peter S
RV-4
Fixed-wing, single engine August Aero LLC
Kalispell, Montana
Experimental 2020-05-08 ValidFAA registration status code V: Valid registration. All codes
N84RM Mashburn Ron
RV-4
Fixed-wing, single engine August Aero LLC
Kalispell, Montana
Experimental 2020-05-08 ValidFAA registration status code V: Valid registration. All codes
N1067S Stahl Steve
RV-6
Fixed-wing, single engine Individual owner
Kentucky
Experimental 2020-05-07 ValidFAA registration status code V: Valid registration. All codes
N1654J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Illinois
Standard 2020-05-07 ValidFAA registration status code V: Valid registration. All codes
N32898 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2020-05-07 ValidFAA registration status code V: Valid registration. All codes
N4381R Cessna
172M
Fixed-wing, single engine Individual owner
Ohio
Standard 2020-05-07 ValidFAA registration status code V: Valid registration. All codes
N5416E Cessna
172N
Fixed-wing, single engine Individual owner
Mississippi
Standard 2020-05-07 ValidFAA registration status code V: Valid registration. All codes
N56695 Piper
PA-28-151
Fixed-wing, single engine Wassell Aviation LLC
Irwin, Pennsylvania
Standard 2020-05-07 ValidFAA registration status code V: Valid registration. All codes
N7295G Cessna
172K
Fixed-wing, single engine Hessel Block CO INC
Hessel, Michigan
Standard 2020-05-07 ValidFAA registration status code V: Valid registration. All codes
N114VV Winfield Orville R
VARIVIGGEN
Fixed-wing, single engine August Aero LLC
Kalispell, Montana
Experimental 2020-05-06 ValidFAA registration status code V: Valid registration. All codes
N2681C Piper
PA-18-150
Fixed-wing, single engine Individual owner
Nevada
Standard 2020-05-06 ValidFAA registration status code V: Valid registration. All codes
N3289Q Piper
PA-28-161
Fixed-wing, single engine Trident Aircraft Leasing LLC
Easton, Maryland
Standard 2020-05-06 ValidFAA registration status code V: Valid registration. All codes
N3594Q Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2020-05-06 ValidFAA registration status code V: Valid registration. All codes
N516PU Piper
PA-28-161
Fixed-wing, single engine Airplanes and Helicopters of Oregon LLC
Sisters, Oregon
Standard 2020-05-06 ValidFAA registration status code V: Valid registration. All codes
N6357N Champion
7GCBC
Fixed-wing, single engine Individual owner
Alaska
Standard 2020-05-06 ValidFAA registration status code V: Valid registration. All codes
N8223T Piper
PA-28-161
Fixed-wing, single engine Trident Aircraft Leasing LLC
Easton, Maryland
Standard 2020-05-06 ValidFAA registration status code V: Valid registration. All codes
N1196X Piper
PA-28-140
Fixed-wing, single engine Medic Choppers LLC
Springdale, Arkansas
Standard 2020-05-05 ValidFAA registration status code V: Valid registration. All codes
N1468V Cessna
172M
Fixed-wing, single engine Monmouth Flying Club
Monmouth, Illinois
Standard 2020-05-05 ValidFAA registration status code V: Valid registration. All codes
N26498 Robinson Helicopter
R22 BETA
Helicopter Dodson International Parts INC
Rantoul, Kansas
Standard 2020-05-05 ValidFAA registration status code V: Valid registration. All codes
N5964U Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Texas
Standard 2020-05-05 ValidFAA registration status code V: Valid registration. All codes

Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 9, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.